Middle core rod for sintered heat pipe

Abstract

The utility model discloses a middle core rod for a sintering type heat pipe, which comprises a middle core rod main body which is of a long structure. The section of the middle core rod body is of a cross-shaped structure, and the two end faces of the middle core rod body are both in a cross shape. Therefore, the middle core rod main body can be integrally designed into the cross-shaped structure, so that after the middle core rod main body is inserted into the heat pipe, four powder filling areas can be formed between the middle core rod main body and the heat pipe due to the cross-shaped structure of the middle core rod main body, and then the four powder filling areas are filled with sintering powder; the middle core rod main body is taken out to form two crossed steam channels in the heat pipe, so that when the heat pipe is flattened and sunken, a standby steam channel can be additionally formed, and when the heat pipe is flattened and sunken, even if the phenomenon of powder falling occurs, the heat pipe can be prevented from falling off. And the problem that the whole channel is blocked cannot be caused through the guarantee effect of the standby steam channel.

Description

Technical Field

[0001] The utility model relates to the field of heat pipe technology, in particular to a core rod used for a sintered heat pipe. Background Art

[0002] Sintered heat pipe is a heat exchange device that can be used in various components that require heat dissipation. Due to its wide range of applications and different target fields, it also requires more adaptive adjustments in shape and size.

[0003] For thin sintered heat pipes, a core rod is generally inserted into the heat pipe, and copper powder is sintered to form a sintered layer. The core rod body is then removed, and the heat pipe is flattened to form a steam channel. Traditional core rods are usually designed as round rods or flat rods, resulting in the heat pipe having only one flat or round steam channel. As a result, powder sometimes falls off when the heat pipe is flattened and concave, causing the entire channel to be blocked due to powder falling, resulting in poor product performance and affecting the product yield. In addition, the powder filling area formed after a round rod or flat rod is inserted into the heat pipe is arc-shaped or flat, which makes it easy for the powder to be filled unevenly during powder filling, resulting in the problem of powder offset during powder filling.

[0004] Therefore, it is necessary to develop a new technology to solve the above problems. Utility Model Content

[0005] In view of this, the present invention addresses the deficiencies in the prior art, and its main purpose is to provide a core rod for a sintered heat pipe, which solves the problems of powder falling off when the existing heat pipe is flattened and concave, causing channel blockage and powder deviation when the heat pipe is filled with powder.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A core rod for a sintered heat pipe comprises a core rod body, which is an elongated structure. The cross section of the core rod body is a cross-shaped structure, and both end faces of the core rod body are cross-shaped.

[0008] As a preferred solution, the core rod body includes a main body and four extended protrusions, the main body and the extended protrusions are both rectangular, the four extended protrusions are respectively integrally connected to the four side surfaces of the main body, and the left and right end faces of the four extended protrusions are respectively flush with the left and right end faces of the main body.

[0009] As a preferred solution, both left and right ends of the side surface of the extending protrusion away from the main body are formed with arc chamfers.

[0010] As a preferred solution, the angle between two adjacent extended protrusions is a right angle.

[0011] As a preferred solution, the four extending protrusions are arranged centrosymmetrically around the center line of the main body.

[0012] As a preferred solution, the material of the core rod body is stainless steel.

[0013] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that the main body of the core rod is designed to be a long structure, and the cross section of the core rod is designed to be a cross structure, and the two end faces of the core rod are designed to be cross-shaped. In this way, the core rod body as a whole can be designed to be a cross structure. In this way, after the core rod body is inserted into the heat pipe, due to the cross structure of the core rod body, four powder filling areas can be formed between the core rod body and the heat pipe, and then the sintering powder is filled in the four powder filling areas, and then sintering is performed to form powder in the heat pipe. After a sintered powder layer is formed, the core rod body is taken out to form two steam channels intersecting in a cross shape in the heat pipe. In this way, when the heat pipe is flattened and depressed, a spare steam channel can be added. In this way, even if powder falls off when the heat pipe is flattened and depressed, the spare steam channel can be used to protect it and will not cause the problem of blockage of the entire channel, thereby improving the yield rate and ensuring the performance of the product. In addition, after the core rod body with a cross structure is inserted into the heat pipe, four uniform powder filling areas can be formed, thereby ensuring that the powder can be evenly filled and solving the problem of powder offset during filling.

[0014] In order to more clearly illustrate the structural features, technical means and specific purposes and functions achieved by the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the present utility model;

[0016] Figure 2 It is a cross-sectional view of an embodiment of the present utility model;

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of an embodiment of the present utility model assembled on a heat pipe;

[0018] Figure 4 This is a schematic diagram of the three-dimensional structure of the embodiment of the utility model and the heat pipe;

[0019] Figure 5 This is a schematic diagram of the three-dimensional structure of the embodiment of the utility model and the heat pipe from another angle;

[0020] Figure 6 This is a cross-sectional schematic diagram of an embodiment of the present invention mounted on a heat pipe;

[0021] Figure 7 This is a schematic cross-sectional view of the heat pipe after powder filling and sintering according to an embodiment of the present invention.

[0022] Description of the accompanying drawings:

[0023] 10. Core rod body 11. Main body

[0024] 12. Extended convex part 13. Arc chamfer

[0025] 20. Heat pipe. DETAILED DESCRIPTION

[0026] Please refer to Figures 1 to 7 As shown, it shows the specific structure of an embodiment of the present utility model.

[0027] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0028] A core rod for a sintered heat pipe 20 includes a core rod body 10, wherein the core rod body 10 is a long structure; the cross section of the core rod body 10 is a cross-shaped structure, and both end faces of the core rod body 10 are cross-shaped. In this way, the core rod body 10 can be designed as a cross-shaped structure as a whole. In this way, after the core rod body 10 is inserted into the heat pipe 20 (here, after the core rod body 10 is inserted into the heat pipe 20, the peripheral side wall of the core rod body 10 is preferably in close contact with the inner side wall of the heat pipe 20), since the core rod body 10 is in a cross-shaped structure, four powder filling areas can be formed between the core rod body 10 and the heat pipe 20. Then, sintering powder is filled in the four powder filling areas, and then sintering is performed to form a sintered powder layer inside the heat pipe 20. Then, the core rod body 10 is taken out and the heat pipe 20 can be heated. Two steam channels intersecting in a cross shape are formed in the tube 20. In this way, when the heat pipe 20 is flattened and concave, a spare steam channel can be added. In this way, even if powder falls off when the heat pipe 20 is flattened and concave, the spare steam channel can be used to ensure that the entire channel will not be blocked, thereby improving the yield rate and ensuring the performance of the product. In addition, after the cross-shaped core rod body 10 is inserted into the heat pipe 20, four uniform powder filling areas can be formed, thereby ensuring that the powder can be evenly filled and solving the problem of powder offset during filling. In addition, the core rod needs to undergo three processes before use: quenching, heat treatment, and application of a release agent.

[0029] Specifically, in this embodiment, the core rod body 10 includes a main body 11 and four extended protrusions 12, the main body 11 and the extended protrusions 12 are both rectangular, the four extended protrusions 12 are respectively integrally connected to the four side surfaces of the main body 11, and the four extended protrusions 12 are centrally symmetrically arranged around the center line of the main body 11. The left and right end surfaces of the four extended protrusions 12 are respectively flush with the left and right end surfaces of the main body 11. The angle between two adjacent extended protrusions 12 is a right angle. Arc chamfers 13 are formed on the left and right ends of the side surface of the extended protrusion 12 away from the main body 11. After the core rod body 10 is inserted into the heat pipe 20, the arc chamfers 13 of the extended protrusions 12 of the core rod body 10 are preferably in close contact with the inner wall of the heat pipe 20.

[0030] Furthermore, the material of the core rod body 10 is preferably stainless steel, which is cut into a cross-shaped rod body and then polished to remove burrs to form a finished product.

[0031] In summary, the design focus of the present invention is that it is mainly through designing the core rod body into a long structure, and designing the cross section of the core rod body into a cross structure, and designing both end faces of the core rod body into a cross shape, so that the core rod body as a whole can be designed into a cross structure. In this way, after the core rod body is inserted into the heat pipe, due to the cross structure of the core rod body, four powder filling areas can be formed between the core rod body and the heat pipe, and then sintering powder is filled in the four powder filling areas, and then sintering is performed to form a sintered powder layer inside the heat pipe, and then When the main body of the core rod is taken out, two steam channels intersecting in a cross shape can be formed in the heat pipe. In this way, when the heat pipe is flattened and depressed, a spare steam channel can be added. In this way, even if powder falls off when the heat pipe is flattened and depressed, the spare steam channel can be used to protect it and will not cause the problem of blockage of the entire channel, thereby improving the yield rate and ensuring the performance of the product. In addition, after the main body of the core rod with a cross structure is inserted into the heat pipe, four uniform powder filling areas can be formed, thereby ensuring that the powder can be evenly filled and solving the problem of powder offset during filling.

[0032] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A core rod for a sintered heat pipe, comprising a core rod body, wherein the core rod body is an elongated structure; characterized in that: The cross section of the core rod body is a cross-shaped structure, and both end surfaces of the core rod body are cross-shaped.

2. The core rod for a sintered heat pipe according to claim 1, characterized in that: The core rod body includes a main body and four extended protrusions, both of which are rectangular. The four extended protrusions are integrally connected to the four side surfaces of the main body, and the left and right end surfaces of the four extended protrusions are flush with the left and right end surfaces of the main body.

3. The core rod for a sintered heat pipe according to claim 2, characterized in that: Both left and right ends of the side surface of the extending protrusion away from the main body are formed with arc chamfers.

4. The core rod for a sintered heat pipe according to claim 2, characterized in that: The included angle between two adjacent extended protrusions is a right angle.

5. The core rod for a sintered heat pipe according to claim 2, characterized in that: The four extending protrusions are centrally symmetrically arranged around the center line of the main body.

6. The core rod for a sintered heat pipe according to claim 1, characterized in that: The material of the core rod body is stainless steel.

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